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Array substrate for liquid crystal display device

a liquid crystal display and substrate technology, applied in non-linear optics, instruments, optics, etc., can solve the problems of insufficient storage capacitance of the above storage capacitor stgc, limited rapid response, disadvantage in aperture ratio, etc., and achieve the effect of improving aperture ratio

Inactive Publication Date: 2011-03-03
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an array substrate for an LCD device that improves aperture ratio and has sufficient storage capacitance. This is achieved by a structure that includes a plurality of gate lines, data lines, thin film transistors, and pixel electrodes. Additionally, first and second shield patterns are included to improve the performance of the device.

Problems solved by technology

In the array substrate including the above storage capacitor StgC, there is a limitation in rapid response.
Namely, the storage capacitance of the above storage capacitor StgC is insufficient.
If an overlapped area of the pixel electrode 85 and the previous gate line 53 is increased to obtain sufficient storage capacitance, there is a disadvantage in aperture ratio.

Method used

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  • Array substrate for liquid crystal display device
  • Array substrate for liquid crystal display device
  • Array substrate for liquid crystal display device

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first embodiment

[0029]FIG. 3 is a plane view showing one pixel region of an array substrate for an LCD device according to the present invention.

[0030]As shown in FIG. 3, a gate line 105 and a data line 130 are disposed on a substrate 101. The gate and data lines 105 and 130 cross each other to define a pixel region P.

[0031]A common line 108 is disposed on the substrate 101 and is spaced apart from the gate line 105. The common line 108 is substantially parallel to the gate line 105. The common line 108 is disposed at the same layer as the gate line 105. In addition, first and second shield patterns 115a and 115b extends from the common line 108. The first shield pattern 115a is disposed at one side of the pixel region P, and the second shield pattern 115b is disposed at the other side of the pixel region P. Each of the first and second shield patterns 115a and 115b is substantially parallel to the data line 130. To avoid an electrical short with the previous gate line, an end of each of the first ...

second embodiment

[0052]In the present invention, since there are three or four storage capacitors, the array substrate has sufficient storage capacitance. In addition, since the first and second shield patterns shield a space between the data line and the pixel electrode, the array substrate has improved aperture ratio. Furthermore, since there is no common line in the array substrate of the second embodiment, the array substrate has further improved aperture ratio.

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Abstract

An array substrate for a liquid crystal display device includes a plurality of gate lines on a substrate; a plurality of data lines crossing the plurality of gate lines to define a plurality of pixel regions; a thin film transistor connected to one of the plurality of gate lines and one of the plurality of data lines and disposed in one pixel region of the plurality of pixel regions; first and second shield patterns respectively extending from a previous gate line of the plurality of gate lines to the one pixel region, the first shield pattern disposed at one side of the one pixel region, and the second shield pattern disposed at the other side of the one pixel region; and a pixel electrode in the one pixel region and over the thin film transistor, the pixel electrode overlapping the first and second shield patterns and the previous gate line.

Description

[0001]The present application claims the benefit of Korean Patent Application No. 10-2009-0082669 filed in Korea on Sep. 2, 2009, which is hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a liquid crystal display (LCD) device and more particularly to an arrays substrate having improved aperture ratio and storage capacitance.[0004]2. Discussion of the Related Art[0005]Recently, the LCD devices having characteristics of light weight, thinness and low power consumption are introduced. Among these LCD devices, the LCD device including a thin film transistor (TFT) as a switching element, referred to as an active matrix LCD (AM-LCD) device, has excellent characteristics of high resolution and displaying moving images such that the AM-LCD device are widely used.[0006]Generally, the LCD devices are fabricated by an array substrate process, a color filter substrate process and a cell process. In the array substr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02F1/136
CPCG02F1/136213
Inventor SHIN, CHANG-YEOPKIM, JEONG-KILEE, SUN-YONG
Owner LG DISPLAY CO LTD